Help Hanoi and HCMC/stay , visa etc

Hi,
My wife and I are planning to be in Hanoi around July 2nd for at least 10 days. It will be our first visit to Vietnam and we are looking for the following information:
1) A good site for Vietnam Visa information needs?
2) Wish list for housing: if possible small and Economical for two people but we prefer with kitchen/furnished, safe and clean.  +boons: washing machine, newer building, good communication and extra bonus near supermarket  Near tennis courts
3) Nice tenant that will help us if we need it.
In advance we thank anyone that can provide us some tips and help to us.
Kind Regards,
Roberto and wife and Elaine